Modify debuginfo to deal with the difference between source and memory order

Fix gdb enum tests to ignore garbage variants, as we no longer actually know what the garbage is.

src/librustc_trans/debuginfo/metadata.rs

@@ -881,25 +881,28 @@ impl<'tcx> MemberDescriptionFactory<'tcx> {
 
 // Creates MemberDescriptions for the fields of a struct
 struct StructMemberDescriptionFactory<'tcx> {
+    ty: Ty<'tcx>,
     variant: &'tcx ty::VariantDef,
     substs: &'tcx Substs<'tcx>,
-    is_simd: bool,
     span: Span,
 }
 
 impl<'tcx> StructMemberDescriptionFactory<'tcx> {
     fn create_member_descriptions<'a>(&self, cx: &CrateContext<'a, 'tcx>)
                                       -> Vec<MemberDescription> {
-        let field_size = if self.is_simd {
+        let layout = cx.layout_of(self.ty);
-            let fty = monomorphize::field_ty(cx.tcx(),
+        
-                                             self.substs,
+        // The following code is slightly convoluted as to allow us to avoid allocating in the Univariant case.
-                                             &self.variant.fields[0]);
+        // tmp exists only so we can take a reference to it in the second match arm below.
-            Some(machine::llsize_of_alloc(
+        let tmp;
-                cx,
+        let offsets = match *layout {
-                type_of::type_of(cx, fty)
+            layout::Univariant { ref variant, .. } => &variant.offsets,
-            ) as usize)
+            layout::Vector { element, count } => {
-        } else {
+                let element_size = element.size(&cx.tcx().data_layout).bytes();
-            None
+                tmp = (0..count).map(|i| layout::Size::from_bytes(i*element_size)).collect::<Vec<layout::Size>>();
+                &tmp
+            }
+            _ => bug!("{} is not a struct", self.ty)
         };
 
         self.variant.fields.iter().enumerate().map(|(i, f)| {
@@ -910,11 +913,7 @@ impl<'tcx> StructMemberDescriptionFactory<'tcx> {
             };
             let fty = monomorphize::field_ty(cx.tcx(), self.substs, f);
 
-            let offset = if self.is_simd {
+            let offset = FixedMemberOffset { bytes: offsets[i].bytes() as usize};
-                FixedMemberOffset { bytes: i * field_size.unwrap() }
-            } else {
-                ComputedMemberOffset
-            };
 
             MemberDescription {
                 name: name,
@@ -956,9 +955,9 @@ fn prepare_struct_metadata<'a, 'tcx>(cx: &CrateContext<'a, 'tcx>,
         struct_metadata_stub,
         struct_llvm_type,
         StructMDF(StructMemberDescriptionFactory {
+            ty: struct_type,
             variant: variant,
             substs: substs,
-            is_simd: struct_type.is_simd(),
             span: span,
         })
     )
@@ -970,6 +969,7 @@ fn prepare_struct_metadata<'a, 'tcx>(cx: &CrateContext<'a, 'tcx>,
 
 // Creates MemberDescriptions for the fields of a tuple
 struct TupleMemberDescriptionFactory<'tcx> {
+    ty: Ty<'tcx>,
     component_types: Vec<Ty<'tcx>>,
     span: Span,
 }
@@ -977,6 +977,13 @@ struct TupleMemberDescriptionFactory<'tcx> {
 impl<'tcx> TupleMemberDescriptionFactory<'tcx> {
     fn create_member_descriptions<'a>(&self, cx: &CrateContext<'a, 'tcx>)
                                       -> Vec<MemberDescription> {
+        let layout = cx.layout_of(self.ty);
+        let offsets = if let layout::Univariant { ref variant, .. } = *layout {
+            &variant.offsets
+        } else {
+            bug!("{} is not a tuple", self.ty);
+        };
+
         self.component_types
             .iter()
             .enumerate()
@@ -985,7 +992,7 @@ impl<'tcx> TupleMemberDescriptionFactory<'tcx> {
                 name: format!("__{}", i),
                 llvm_type: type_of::type_of(cx, component_type),
                 type_metadata: type_metadata(cx, component_type, self.span),
-                offset: ComputedMemberOffset,
+                offset: FixedMemberOffset { bytes: offsets[i].bytes() as usize },
                 flags: DIFlags::FlagZero,
             }
         }).collect()
@@ -1012,6 +1019,7 @@ fn prepare_tuple_metadata<'a, 'tcx>(cx: &CrateContext<'a, 'tcx>,
                            NO_SCOPE_METADATA),
         tuple_llvm_type,
         TupleMDF(TupleMemberDescriptionFactory {
+            ty: tuple_type,
             component_types: component_types.to_vec(),
             span: span,
         })
@@ -1300,6 +1308,8 @@ impl<'tcx> EnumMemberDescriptionFactory<'tcx> {
 
 // Creates MemberDescriptions for the fields of a single enum variant.
 struct VariantMemberDescriptionFactory<'tcx> {
+    // Cloned from the layout::Struct describing the variant.
+    offsets: Vec<layout::Size>,
     args: Vec<(String, Ty<'tcx>)>,
     discriminant_type_metadata: Option<DIType>,
     span: Span,
@@ -1316,7 +1326,7 @@ impl<'tcx> VariantMemberDescriptionFactory<'tcx> {
                     Some(metadata) if i == 0 => metadata,
                     _ => type_metadata(cx, ty, self.span)
                 },
-                offset: ComputedMemberOffset,
+                offset: FixedMemberOffset { bytes: self.offsets[i].bytes() as usize },
                 flags: DIFlags::FlagZero
             }
         }).collect()
@@ -1420,6 +1430,7 @@ fn describe_enum_variant<'a, 'tcx>(cx: &CrateContext<'a, 'tcx>,
 
     let member_description_factory =
         VariantMDF(VariantMemberDescriptionFactory {
+            offsets: struct_def.offsets.clone(),
             args: args,
             discriminant_type_metadata: match discriminant_info {
                 RegularDiscriminant(discriminant_type_metadata) => {

src/test/debuginfo/borrowed-enum.rs

@@ -18,11 +18,11 @@
 // gdb-command:run
 
 // gdb-command:print *the_a_ref
-// gdbg-check:$1 = {{RUST$ENUM$DISR = TheA, x = 0, y = 8970181431921507452}, {RUST$ENUM$DISR = TheA, __0 = 0, __1 = 2088533116, __2 = 2088533116}}
+// gdbg-check:$1 = {{RUST$ENUM$DISR = TheA, x = 0, y = 8970181431921507452}, {RUST$ENUM$DISR = TheA, [...]}}
 // gdbr-check:$1 = borrowed_enum::ABC::TheA{x: 0, y: 8970181431921507452}
 
 // gdb-command:print *the_b_ref
-// gdbg-check:$2 = {{RUST$ENUM$DISR = TheB, x = 0, y = 1229782938247303441}, {RUST$ENUM$DISR = TheB, __0 = 0, __1 = 286331153, __2 = 286331153}}
+// gdbg-check:$2 = {{RUST$ENUM$DISR = TheB, [...]}, {RUST$ENUM$DISR = TheB, __0 = 0, __1 = 286331153, __2 = 286331153}}
 // gdbr-check:$2 = borrowed_enum::ABC::TheB(0, 286331153, 286331153)
 
 // gdb-command:print *univariant_ref

src/test/debuginfo/by-value-non-immediate-argument.rs

@@ -42,7 +42,7 @@
 // gdb-command:continue
 
 // gdb-command:print x
-// gdbg-check:$7 = {{RUST$ENUM$DISR = Case1, x = 0, y = 8970181431921507452}, {RUST$ENUM$DISR = Case1, __0 = 0, __1 = 2088533116, __2 = 2088533116}}
+// gdbg-check:$7 = {{RUST$ENUM$DISR = Case1, x = 0, y = 8970181431921507452}, {RUST$ENUM$DISR = Case1, [...]}}
 // gdbr-check:$7 = by_value_non_immediate_argument::Enum::Case1{x: 0, y: 8970181431921507452}
 // gdb-command:continue
 

src/test/debuginfo/generic-struct-style-enum.rs

@@ -17,15 +17,15 @@
 // gdb-command:run
 
 // gdb-command:print case1
-// gdbg-check:$1 = {{RUST$ENUM$DISR = Case1, a = 0, b = 31868, c = 31868, d = 31868, e = 31868}, {RUST$ENUM$DISR = Case1, a = 0, b = 2088533116, c = 2088533116}, {RUST$ENUM$DISR = Case1, a = 0, b = 8970181431921507452}}
+// gdbg-check:$1 = {{RUST$ENUM$DISR = Case1, a = 0, b = 31868, c = 31868, d = 31868, e = 31868}, {RUST$ENUM$DISR = Case1, [...]}, {RUST$ENUM$DISR = Case1, [...]}}
 // gdbr-check:$1 = generic_struct_style_enum::Regular::Case1{a: 0, b: 31868, c: 31868, d: 31868, e: 31868}
 
 // gdb-command:print case2
-// gdbg-check:$2 = {{RUST$ENUM$DISR = Case2, a = 0, b = 4369, c = 4369, d = 4369, e = 4369}, {RUST$ENUM$DISR = Case2, a = 0, b = 286331153, c = 286331153}, {RUST$ENUM$DISR = Case2, a = 0, b = 1229782938247303441}}
+// gdbg-check:$2 = {{RUST$ENUM$DISR = Case2, [...]}, {RUST$ENUM$DISR = Case2, a = 0, b = 286331153, c = 286331153}, {RUST$ENUM$DISR = Case2, [...]}}
 // gdbr-check:$2 = generic_struct_style_enum::Regular::Case2{a: 0, b: 286331153, c: 286331153}
 
 // gdb-command:print case3
-// gdbg-check:$3 = {{RUST$ENUM$DISR = Case3, a = 0, b = 22873, c = 22873, d = 22873, e = 22873}, {RUST$ENUM$DISR = Case3, a = 0, b = 1499027801, c = 1499027801}, {RUST$ENUM$DISR = Case3, a = 0, b = 6438275382588823897}}
+// gdbg-check:$3 = {{RUST$ENUM$DISR = Case3, [...]}, {RUST$ENUM$DISR = Case3, [...]}, {RUST$ENUM$DISR = Case3, a = 0, b = 6438275382588823897}}
 // gdbr-check:$3 = generic_struct_style_enum::Regular::Case3{a: 0, b: 6438275382588823897}
 
 // gdb-command:print univariant

src/test/debuginfo/generic-tuple-style-enum.rs

@@ -19,15 +19,15 @@
 // gdb-command:run
 
 // gdb-command:print case1
-// gdbg-check:$1 = {{RUST$ENUM$DISR = Case1, __0 = 0, __1 = 31868, __2 = 31868, __3 = 31868, __4 = 31868}, {RUST$ENUM$DISR = Case1, __0 = 0, __1 = 2088533116, __2 = 2088533116}, {RUST$ENUM$DISR = Case1, __0 = 0, __1 = 8970181431921507452}}
+// gdbg-check:$1 = {{RUST$ENUM$DISR = Case1, __0 = 0, __1 = 31868, __2 = 31868, __3 = 31868, __4 = 31868}, {RUST$ENUM$DISR = Case1, [...]}, {RUST$ENUM$DISR = Case1, [...]}}
 // gdbr-check:$1 = generic_tuple_style_enum::Regular::Case1(0, 31868, 31868, 31868, 31868)
 
 // gdb-command:print case2
-// gdbg-check:$2 = {{RUST$ENUM$DISR = Case2, __0 = 0, __1 = 4369, __2 = 4369, __3 = 4369, __4 = 4369}, {RUST$ENUM$DISR = Case2, __0 = 0, __1 = 286331153, __2 = 286331153}, {RUST$ENUM$DISR = Case2, __0 = 0, __1 = 1229782938247303441}}
+// gdbg-check:$2 = {{RUST$ENUM$DISR = Case2, [...]}, {RUST$ENUM$DISR = Case2, __0 = 0, __1 = 286331153, __2 = 286331153}, {RUST$ENUM$DISR = Case2, [...]}}
 // gdbr-check:$2 = generic_tuple_style_enum::Regular::Case2(0, 286331153, 286331153)
 
 // gdb-command:print case3
-// gdbg-check:$3 = {{RUST$ENUM$DISR = Case3, __0 = 0, __1 = 22873, __2 = 22873, __3 = 22873, __4 = 22873}, {RUST$ENUM$DISR = Case3, __0 = 0, __1 = 1499027801, __2 = 1499027801}, {RUST$ENUM$DISR = Case3, __0 = 0, __1 = 6438275382588823897}}
+// gdbg-check:$3 = {{RUST$ENUM$DISR = Case3, [...]}, {RUST$ENUM$DISR = Case3, [...]}, {RUST$ENUM$DISR = Case3, __0 = 0, __1 = 6438275382588823897}}
 // gdbr-check:$3 = generic_tuple_style_enum::Regular::Case3(0, 6438275382588823897)
 
 // gdb-command:print univariant

src/test/debuginfo/struct-style-enum.rs

@@ -19,15 +19,15 @@
 // gdb-command:run
 
 // gdb-command:print case1
-// gdbg-check:$1 = {{RUST$ENUM$DISR = Case1, a = 0, b = 31868, c = 31868, d = 31868, e = 31868}, {RUST$ENUM$DISR = Case1, a = 0, b = 2088533116, c = 2088533116}, {RUST$ENUM$DISR = Case1, a = 0, b = 8970181431921507452}}
+// gdbg-check:$1 = {{RUST$ENUM$DISR = Case1, a = 0, b = 31868, c = 31868, d = 31868, e = 31868}, {RUST$ENUM$DISR = Case1, [...]}, {RUST$ENUM$DISR = Case1, [...]}}
 // gdbr-check:$1 = struct_style_enum::Regular::Case1{a: 0, b: 31868, c: 31868, d: 31868, e: 31868}
 
 // gdb-command:print case2
-// gdbg-check:$2 = {{RUST$ENUM$DISR = Case2, a = 0, b = 4369, c = 4369, d = 4369, e = 4369}, {RUST$ENUM$DISR = Case2, a = 0, b = 286331153, c = 286331153}, {RUST$ENUM$DISR = Case2, a = 0, b = 1229782938247303441}}
+// gdbg-check:$2 = {{RUST$ENUM$DISR = Case2, [...]}, {RUST$ENUM$DISR = Case2, a = 0, b = 286331153, c = 286331153}, {RUST$ENUM$DISR = Case2, [...]}}
 // gdbr-check:$2 = struct_style_enum::Regular::Case2{a: 0, b: 286331153, c: 286331153}
 
 // gdb-command:print case3
-// gdbg-check:$3 = {{RUST$ENUM$DISR = Case3, a = 0, b = 22873, c = 22873, d = 22873, e = 22873}, {RUST$ENUM$DISR = Case3, a = 0, b = 1499027801, c = 1499027801}, {RUST$ENUM$DISR = Case3, a = 0, b = 6438275382588823897}}
+// gdbg-check:$3 = {{RUST$ENUM$DISR = Case3, [...]}, {RUST$ENUM$DISR = Case3, [...]}, {RUST$ENUM$DISR = Case3, a = 0, b = 6438275382588823897}}
 // gdbr-check:$3 = struct_style_enum::Regular::Case3{a: 0, b: 6438275382588823897}
 
 // gdb-command:print univariant

src/test/debuginfo/tuple-style-enum.rs

@@ -19,15 +19,15 @@
 // gdb-command:run
 
 // gdb-command:print case1
-// gdbg-check:$1 = {{RUST$ENUM$DISR = Case1, __0 = 0, __1 = 31868, __2 = 31868, __3 = 31868, __4 = 31868}, {RUST$ENUM$DISR = Case1, __0 = 0, __1 = 2088533116, __2 = 2088533116}, {RUST$ENUM$DISR = Case1, __0 = 0, __1 = 8970181431921507452}}
+// gdbg-check:$1 = {{RUST$ENUM$DISR = Case1, __0 = 0, __1 = 31868, __2 = 31868, __3 = 31868, __4 = 31868}, {RUST$ENUM$DISR = Case1, [...]}, {RUST$ENUM$DISR = Case1, [...]}}
 // gdbr-check:$1 = tuple_style_enum::Regular::Case1(0, 31868, 31868, 31868, 31868)
 
 // gdb-command:print case2
-// gdbg-check:$2 = {{RUST$ENUM$DISR = Case2, __0 = 0, __1 = 4369, __2 = 4369, __3 = 4369, __4 = 4369}, {RUST$ENUM$DISR = Case2, __0 = 0, __1 = 286331153, __2 = 286331153}, {RUST$ENUM$DISR = Case2, __0 = 0, __1 = 1229782938247303441}}
+// gdbg-check:$2 = {{RUST$ENUM$DISR = Case2, [...]}, {RUST$ENUM$DISR = Case2, __0 = 0, __1 = 286331153, __2 = 286331153}, {RUST$ENUM$DISR = Case2, [...]}}
 // gdbr-check:$2 = tuple_style_enum::Regular::Case2(0, 286331153, 286331153)
 
 // gdb-command:print case3
-// gdbg-check:$3 = {{RUST$ENUM$DISR = Case3, __0 = 0, __1 = 22873, __2 = 22873, __3 = 22873, __4 = 22873}, {RUST$ENUM$DISR = Case3, __0 = 0, __1 = 1499027801, __2 = 1499027801}, {RUST$ENUM$DISR = Case3, __0 = 0, __1 = 6438275382588823897}}
+// gdbg-check:$3 = {{RUST$ENUM$DISR = Case3, [...]}, {RUST$ENUM$DISR = Case3, [...]}, {RUST$ENUM$DISR = Case3, __0 = 0, __1 = 6438275382588823897}}
 // gdbr-check:$3 = tuple_style_enum::Regular::Case3(0, 6438275382588823897)
 
 // gdb-command:print univariant

src/test/debuginfo/unique-enum.rs

@@ -18,11 +18,11 @@
 // gdb-command:run
 
 // gdb-command:print *the_a
-// gdbg-check:$1 = {{RUST$ENUM$DISR = TheA, x = 0, y = 8970181431921507452}, {RUST$ENUM$DISR = TheA, __0 = 0, __1 = 2088533116, __2 = 2088533116}}
+// gdbg-check:$1 = {{RUST$ENUM$DISR = TheA, x = 0, y = 8970181431921507452}, {RUST$ENUM$DISR = TheA, [...]}}
 // gdbr-check:$1 = unique_enum::ABC::TheA{x: 0, y: 8970181431921507452}
 
 // gdb-command:print *the_b
-// gdbg-check:$2 = {{RUST$ENUM$DISR = TheB, x = 0, y = 1229782938247303441}, {RUST$ENUM$DISR = TheB, __0 = 0, __1 = 286331153, __2 = 286331153}}
+// gdbg-check:$2 = {{RUST$ENUM$DISR = TheB, [...]}, {RUST$ENUM$DISR = TheB, __0 = 0, __1 = 286331153, __2 = 286331153}}
 // gdbr-check:$2 = unique_enum::ABC::TheB(0, 286331153, 286331153)
 
 // gdb-command:print *univariant